Pipe-cutting machine.



W. W.` VOSPBR. PIPE CUTTING MACHINE.

APPLICATION FILED APR. 4, 1912.

2 SHEETS-SHEET 1.

1,074,834. y Patented Sept. 30,1913.

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W. W. VOSPER.

PIPE C UTTING MACHINE. APPLICATION FILED APRA, 1912.

2 SHEETS-SHEET Z.

. 1,074,334. n Patented Sept. 30, 1913.

wf TNE'ESEE www j-sTATEs .PATENT OFFICE.

-WILLIAM w.- vosPEn, or ToLEno,

oHIo, AssiGNoR MACHINE COMPANY, E TOLEDO, omo, A

11o-THE roLEno PIPETHBEAEING CoaroaATIoN 0E omo.

PIPE-Carrillo MACHINE.

To all whom t may concern:

" Be it known that I, WILLIAM W.) VosrER, a citizen of the lUnited States, and aresident' of Toledo, in the county of Lucas and State of Ohio, haveinvented a certain new and useful Pipe-Cutting Machine; and l do. hereby 'decla-re the following to be a vfull, clear,`

'and exactl description of the invent-ion, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the 'characters ofl ref--VV erence marked thereon, which forma part of this specification.

My invention relates to machines for cutting pipes or similar articles, and particui j kind, but 'is notlrestricted to such use as it Y larly to handoperated. machines of-this mayv be employed in any connection for which it may be adapted or appropriate. v

y The object of my invention is the provision of an improved -apparatus of this character, which is easy and 'simple in its operation, strong and durable in its construction, and adapted to make a clean radial cut, whichis free from the inner and outer burs left on pipes by the cuttingniachines com-` monly employed.

A further object of my invention is to arrange and construct the cutting edges of the cutting dies so that, in a set ofv four, for instance, the dies will alternately act to commenceand complete a flfll, width cutof `afu'rrow, whereby to make asmooth, clean cut-- and to obviate' the objections and difficulties of the furrow bottom.

Further objects and advantages of the invention will be apparent from the following detailed description. y

The invention is fully described in the following speciiica-tion, and while. jin its broader aspect, it is capable of embodiment in numerous forms, a preferred embodiment thereof is illustrated inthe accompanying incident to each die' taking a full width Cutdrawings, in'which,-I

Figure 1 is a plan View ofthe die, carrying side of an apparatus comprising myfinvention.` Fig. '2 is a cross-section thereof on the line in Fig. 1. Fig., 3 is an outer face" view of the 4work' holder with the dic carrying headreinoved.l Fig.4 is an outer'end view of two of the automatically 'operating'. die adjusting parts. Figs.r5 and 6 are detalls of the two forms of cutting :dies employed,

specimen of Letters Parent. Patented sept. 3o, 1913. Application led April 4, 1912. Serial No. 688,523;

and Fig. 7.is a'diagrammatical view in perspective of a piece of work withV two dies lhaving''differently formed cutting edges successively acting thereon.

Referring to the drawings, 1 designates the work-holder, having a central opening ofv suitable size and'shape to receive work to be acted on, and 2 the die-carrying head, which is suitably mounted for relative' rotary movements upon an' end of the work holder, and driven by any suitable means carried by the holder. Y

The work-holder carries a plurality of radially-movable work clamping parts 3 within its opening, such parts being shown, in

the present instance, as three in number, and A each of theseparts has a shank 4 projecting outward therefrom dial guide-opening or recess in the outer end o-:t the holder and is bent laterally at its outer end, as at 4. An adiustingscrew V5 threads radially through the'holder for each clamping part, with its inner end bearing against the associated part 3 and its outer end projectedthrough and anchored against longitudinal movements in the bent end 4 of the shank of such part. The shanks 4-are retained in the holder recess by plates 6, and have their outer surfaces preferably graduated, as` at 7 'to facilitate an adjustment through a registering rathereof to accurately'center a piece of work i within the holder, as is apparent.

'The dlecarrylng head' 2 is substantially of circularform, withv aV central work-receiving opening conforming to that of the.

holder 1, and has, in the present instance, a. set ot four rarlial'recesscs 8 in its outer face in which dieran-ying blocks -9 are .dove-tailed -or otherwise suitably lretained for radial movements.

The recesses 8 are shown Vas being.

ears' 11 projectprovided in enlargements .10 ot' thehcad, which have ing laterally therefrom across the outer endsl ot. the recesses 8.

Adjusting-screws 12 thread longitudinally lagainst axial `movements relative thereto.

i in'tov the outer ends of the blocks 9 and have their outer ends working through openings Vin the ears 11 12 without its carrying-ear 11, and upon a relativ-e rotation of the head and holder this wheel is intended .to-:have intermittentloo wheels for use in effecting ahand adjustment of the blocks 9. l

The blocks 9 are provided in their outer faces with recesses 16 in which cuttin dies 17 and 17 are rsecured in properly adjusted positions by clamping-plates 18 and screws 19. The recesses 16 are preferably so disposed as to incline the forward edge of a die-bar rearwardly from the point `of cut, as shown in Fig. 1.

The head 2 has an annular flange 2O proljecting from its inner side for engaging under an annular shoulder 21 around the inner end of the work-holder to coperate therewith in retaining the two' parts in relative rotary engagement. The flange 20 also has its outer'end formed with teeth to provide a gear on the head for the drivegear 22 to mesh with, as-shown in Fig. 2. The gear 22 is mounted on a stud 23 rojecting radially from one side of the ho dei` l1, and has a shaft. portion 24 fiXedly projecting from its outer end for receiving a crank or ratchet handle. The flange 20 preferably rests within an annularly reduced portion of the holder to render the construction compact and to provide a guard for the flange teeth, While the gear 22 rests within a recess 2.5' in the holder for the same purposes.

In order to make a clean cut, the edges of which are not gouged out, and to also prevent the formation of inner and outer burs on the section ends of a pipe or similar article when severed, I change the shapes of the cutting edges of alternate ones of the dies 17 and 17 so that the dies will at least operate in pairs in thel making of a complete cross-sectional cut of the furrow made thereby. To accomplish .this I reduce the width of the cutting edges of opposite or alternate ones of the dies 17 substantially one-half relative to the width of the cutting.

edges of the other dies, as by chamferine the side edges thereof, as shown at 26 in 4iO's. 1 and 5; the other alternately arranged dies of the set having their cutting' edges preferably the full width of the furrow intended to be made by the dies. With this arrangement the dies having the narrow cutting edges, first act on the work to produce a narrow complemental groove 27 therein,

Varid the broad cutting edges of the dies 17 then act to cu off the tapered side edges of the furrow made by the die 17 to pro- ' duce the flat-bottomed parallel-sided furn row 28, as dia ammatically indica-ted in Fig. 7. It is t us apparent that each die strips a portion of metal which islof less width than the full width of the furrowbeing cut, thus enabling the metal chips to work inwardly relatively to the furrow sides instead of tending to gouge out the sidesof the furrow as is found to be the case where the cutting edge of each die is equal iii width to the furrow being cut.

`It sometimes happen that it is desirous to cut a pipe over which the cutter cannot be slipped endwise thereof as in the case of a pipe in a building. To adapt my present cutter for easy engagement with a pipe of this character I make the work-holder 1 and die-carryinghead 2 each of two sectional form and bolt or screw such sections together, as indicated at 29 in Fig. 3 and 30 1n Fig. 1. With this arrangement the sections can be easily and quickly assembled around a pipe to be cut, as is apparent.

In the use of my apparatus, it is mounted upon a pipe or other article to be cut and the -holder centrally clamped thereto by au adjusting of the clamping parts for such purpose. The cutting |dies lare then moved into Contact with the work by la manual adjustment ofthe screws 12. Upon arotation of the die-carrying head, which is accomplished by a turning of the drive pinion 22, the star-wheels 13, on the adjust-ingscrews 12, successively move into contact with and have partial turning movements imparted thereto by the fingers 14 projecting from the work holder. These fingers are shown in the present instance as being two in number sovthat the star wheels receive two adjusting impulses at each revolution of the die-carrying head, thus effecting a slow intermittent inward feeding of the dies as the cutting of the work progresses.

I wish it understood that my invention is not limited to any specific construction or' arrangement of the parts except in so far as such limitations are specified in the claims.

Having thus described my invention, what I claim as new, and desire to ,secure by Letters Patent, is

1. In a machineof the'class described, a work-holding collar having the inner end portion thereof annularly reduced to form a circumferential recess, a die-carrying'head fitting against the inner end of said collar and having an annular portion working in y 12o 2. In a machine of the class described, the

combination of a work-holding collar having its inner end recessed to form an 4annular circlnnferential groove having an outwardly tapered base portion, said collar also having a pinion-receiving socket in one side thereof, said socketbeing substantially the depth of said recess and open at one side to the recess, a die-carrying head having an opening therein in register with the annular opening and seating at its inner edge against the inner end of the collar and having a concentric annular fiange on its inner side with its inner edge complemental to the tapered base of the collar recess to have rotary dove-tailed -engagement therewith to retain the collar and head in assembled relation, the outer end of said flange being toothed with the teeth thereof protected by the inner wall of the collar recess, a stubshaft projecting from the collar centrally within the socket thereof, and a drive pin ion mounted on said shaft in mesh'with the tected by the wall of said socket except at vthe point of meshing thereof with the Hange lng therein, a U-shaped work clamping member having its looped portion mounted for radial movements in said opening and having one leg projecting into the central collar opening for clamping engagement with work disposed therein, and an adjusting screw threaded radially through said collar and having its inner end bearing against the inner clamping leg of said member and its outer end journaled in the outer leg of said member and anchored against longitudinal movements relative to` said member.

In testimony whereof, I have hereunto signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM V (.)Slllt 

